From 776a948eff52c89cc1b1c9bfc2c17807e87c9e1a Mon Sep 17 00:00:00 2001
From: Patrick Ribbsaeter <patrickswedish@gmail.com>
Date: Sun, 26 Jul 2026 22:31:57 +0200
Subject: [PATCH] fix: use a stable SDK user agent

---
 tests/index.test.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tests/index.test.ts b/tests/index.test.ts
index 5aa8b84..3472592 100644
--- a/tests/index.test.ts
+++ b/tests/index.test.ts
@@ -49,6 +49,19 @@ describe('instantiate client', () => {
       });
       expect(req.headers.has('x-my-default-header')).toBe(false);
     });
+
+    test('uses a stable user agent for subclasses', async () => {
+      class MinifiedClient extends Anthropic {}
+
+      const subclassedClient = new MinifiedClient({
+        baseURL: 'http://localhost:5000/',
+        apiKey: 'my-anthropic-api-key',
+      });
+      const { req } = await subclassedClient.buildRequest({ path: '/foo', method: 'post' });
+
+      expect(req.headers.get('user-agent')).toMatch(/^Anthropic\/JS /);
+      expect(req.headers.get('user-agent')).not.toContain('MinifiedClient');
+    });
   });
   describe('logging', () => {
     const env = process.env;
-- 
2.55.0.windows.3